According to the Big Bang theory how long ago did the universe started?

What is playing catch? (in terms of the force of the air interacting with ball)

Trying to solve a crossword the clue is Of Less Than Average Height From Top To Bottom

Explain why it is important to check your brake fluid regularly. explain what happens to the fluid when you step on the brake of a car and how that fluid then acts to make the car slow down.

A train travels 94 kilometers in 5 hours, and then 84 kilometers in 3 hours. What is its average speed?

Calculate the solubility (in m units) of ammonia gas in water at 298 k and a partial pressure of 4.50 bar. the henry's law constant for ammonia gas at 298 k is 58.0 m/atm and 1 bar=0.9869 atm.

Isotope what is the meaning

What is the difference between alternating current and direct current? A. Alternating current regularly reverses direction. Direct current flows in only one direction. B. Alternating current flows in only one direction.

A rod 25 cm long moves in a plane perpendicular to a magnetic field of 600 G. The velocity of the rod is perpendicular to its length and the potential difference between the ends is 10 V. Find the speed of the rod.

An elements atomic number is 79. How many protrons would an atom of this element have?

Two sinusoidal waves are moving through a medium in the positive x-direction, both having amplitudes of 7.00 cm, a wave number of k=3.00m-1, an angular frequency of ω=2.50s-1, and a period of 6.00 s, but one has a phase shift of an angle ϕ=π12rad.